IPO Pattern

301.6 Input

Input — Note 3 of 3

Input -> Process -> Output.

What you need to know

Most programs follow the Input-Process-Output (IPO) pattern: get data from the user, do a calculation, then display the result. Structuring code this way makes it clear and easy to follow.

What to know

Input: gather data from the user
Process: perform calculations or logic
Output: display results to the user
Keep the three stages in order for clarity

Code examples

IPO pattern

python

# INPUT
width = float(input("Width: "))
height = float(input("Height: "))

# PROCESS
area = width * height

# OUTPUT
print("Area = " + str(area))

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Back to Input

Specification notes for programming are in Paper 2.